This is definitely the most enjoyable stage and you are on your own to see what the two of you will dream up . A floating object will sometimes get their attention for awhile. SueNami played with his floating plastic ice cube for more than a month, Leggs liked an orange bobber and several of Carol's have found interesting things to do with a large leggo block (Oscar used it as a den at one point). (I have cross-refferenced names and links in post #2 on the list of our octos if you have not already seen some of these).
I have never had an octopus unscrew anything but others certainly have, filtration elements being the worst of the attempts. I would try a jar with food to see if she relates the unscrewing of the nozzle to a jar lid.
They all seem to like to sit in water flow (I wonder if it helps oxygen exchange) and we see SueNami positioning himself in the return flow and almost daily removing the cages on the Koralias.
I have never had an octopus unscrew anything but others certainly have, filtration elements being the worst of the attempts. I would try a jar with food to see if she relates the unscrewing of the nozzle to a jar lid.
They all seem to like to sit in water flow (I wonder if it helps oxygen exchange) and we see SueNami positioning himself in the return flow and almost daily removing the cages on the Koralias.